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IMB library: Add function that scales an array of byte or float pixels.

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Function just wraps the array in an imbuf and does regular imbuf
scaling.
This commit is contained in:
Antony Riakiotakis
2015-02-23 15:51:01 +01:00
parent eacc3debb7
commit 041f706506
2 changed files with 41 additions and 0 deletions
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8
source/blender/imbuf/IMB_imbuf.h
View File

@@ -352,6 +352,14 @@ struct ImBuf *IMB_onehalf(struct ImBuf *ibuf1);
*/
struct ImBuf *IMB_scaleImBuf(struct ImBuf *ibuf, unsigned int newx, unsigned int newy);
/**
* Scales an array of pixels and returns the result to a new ImBuf
* \attention Defined in scaling.c
*/
struct ImBuf *IMB_scaleArray(const unsigned int *rect, const float *frect,
unsigned int oldw, unsigned int oldh,
unsigned int neww, unsigned int newh);
/**
*
* \attention Defined in scaling.c

33
source/blender/imbuf/intern/scaling.c
View File

@@ -1545,6 +1545,39 @@ struct ImBuf *IMB_scaleImBuf(struct ImBuf *ibuf, unsigned int newx, unsigned int
return(ibuf);
}
struct ImBuf *IMB_scaleArray(const unsigned int *rect, const float *frect,
unsigned int oldw, unsigned int oldh,
unsigned int neww, unsigned int newh)
{
ImBuf *ibuf = NULL;
ImBuf *tmpibuf = IMB_allocImBuf(oldw, oldh, 32, 0);
if (frect) {
/* allocate new image buffer and set the temporary buffer float buffer correctly */
ibuf = IMB_allocImBuf(oldw, oldh, 32, IB_rectfloat);
tmpibuf->rect_float = (float *)frect;
IMB_rectcpy(ibuf, tmpibuf, 0, 0, 0, 0, oldw, oldh);
IMB_scaleImBuf(ibuf, neww, newh);
}
else if (rect) {
ibuf = IMB_allocImBuf(oldw, oldh, 32, IB_rect);
tmpibuf->rect = (unsigned int *)rect;
IMB_rectcpy(ibuf, tmpibuf, 0, 0, 0, 0, oldw, oldh);
IMB_scaleImBuf(ibuf, neww, newh);
}
/* important, else we clean the source image imbufs! */
tmpibuf->rect_float = NULL;
tmpibuf->rect = NULL;
IMB_freeImBuf(tmpibuf);
return ibuf;
}
struct imbufRGBA {
float r, g, b, a;
};